Paper-release device for type-writing machines.



No. 739,102. PATENTED SEPT. 15, 1903. J. G. MOLAUGHLIN.

\ PAPER RELEASE DEVICE FOR TYPE WRITING MACHINES.

APPLIOIATION FILED FEB. 27. 1903.

WITNESSES: INVEfNlOR v ATTORNEYS THE NOERXS PETERS no FHDTO-LITHQ, WASHINGTON, n c.

UNITED STATES Patented September 15, 1903.

PATENT OFFICE.

JOHN C. MCLAUGHLIN, OF NEW YORK, N. Y., ASSIGNOR TO UNDERYVOOD TYPEWRITER COMPANY, OF NEW YORK, N. Y., A CORPORATION OF NEW JERSEY.

PAPER-RELEASE DEVICE FOR TYPE-WRITING MACHINES.

SPECIFICATION forming part of, Letters Patent No. 739,102, dated September 15, 1903.

Application filed February 27, 1903. Serial No. 145,368. (No model-1 To aZZ whom, it may concern/.-

Be it known that I, JOHN G. lVIOLAUGHLIN, a citizen of the United States, residing in the borough of Manhattan, city, county, and State 5 of New York, have invented certain, new and useful Improvements in Paper-Release Devices for Type WVriting Machines, of which the following is a specification.

My invention relates to a paper-release device for type-writing machines, and has for its obj ect to provide a convenient location for the operating means of said paper-release device and also to enable the operator to tell at aglance, by noting the position of said operating means, whether the paper is released or clamped.

My invention will be fully described hereinafter and the features of novelty pointed out inthe appended claims.

. Reference is to be had to the accompanying drawings, in which- Figure 1 is an end elevation of a portion of a type-writer carriage provided with my 'improvements with parts in section, and Fig. 2 is a partial front elevation with parts in section.

A indicates the platen, and B a portion of the frame in which the platen is carried.

A is the shaft of the platen, and O is a stationary rod supported belowthe platen. Upon this stationary rod are pivotally mounted arms 1), extending in opposite directions and carrying at their ends rods E, on which are supported paper-feed rollers F. The arms D are engaged by springs G, having a tendency to throw the rollers F against the platen or paper thereon. The said arms are further provided with projections or tappets D, arranged to embrace a rock-shaft H, mounted to turn in brackets C,projected from the supporting-rod O. This shaft is. also provided with flattened portions or cam portionsI-I,arran ged to engage the tappets D. Thus when the shaft is in the position shown in the drawings the rollers F will engage the platen. If, however, the shaft is turned, the tappets D will be spread apart and the feed-rollers F will be thrown off the platen, thus releasing the paper. So far as "giving the shaft H its rocking motion.

above described the structure is not claimed by me as my invention.

My improvement relates to the means for For this purpose I provide the said shaft with a crank-arm H connected at its free end with a link J, the upper end of which is pivotally connected at J with a crank-arm K upon a shaft K. This shaft is journaled in a bracket B, projected from the frame B. At its outer end the shaft is provided with an arm or key L, having a finger-plate L at its free end. \Vhen the finger-plate L is in its upper position, as shown in the drawings, the feed-rollers F are in contact with the platen. hen the fingerplate L is in its lower position, the feed-rollers are off theplaten, and thus the operator can tell at a glance by noting the position of said finger-plate whether the paperis clamped or released. The springs G hold the tappets D against the shaft H when the latter has been turned so as to spread the tappets. Thus the shaft H and the finger-plate L will stay in one or the other of their two positions until the operator again shifts the finger-plate.

The arm L and finger-plate L are located in a much more accessible position than the shaft H, and thusmy improvement affords great convenience for the operation of the paperrelease device, besides affording means for as certaining at a glance whether this paper-release device is in its clamping or in its release position.

Another advantage of my improved operating device is that when the finger-plate L is depressed slightly it will return to its original position when released that is, the roll ers F will be thrown off the platen only temporarily. When, however, the crank-arms K H and their connecting-link J are moved beyond a certain position, the rollers will be thrown off the platen permanently by the springs G--that is, until the operator moves the finger'plate L upward. This is due to the particular arrangement of the tappets D and the shaft H. When the lever L is depressed by means of the finger-piece L, the shaft H is rotated more or less. By reason of the pressure of the springs G, exerted through the tappets D, upon the flattened portions II of the shaft II there is a tendency to restore the shaft II to its normal position unless said shaft is given about a quarter of a revolution. In this case the pressure of the tappets D will be exerted parallel to the flattened portions II of the shaft II or, in other words, against the narrow edges of such flattened portions. I11 this position the pressure exerted through the tappets I) ceases to have any rotative tendency upon the shaft and the parts tend to remain in such adjusted position.

I claim as my invention and desire to secure by Letters Patent- 1. I11 a type-writing machine or the like, a platen, diverging arms pivoted below the platen and provided with downwardly-extending tappets, pressure devices carried by the upper ends of said arms and arranged to bear against the platen, springs for pressing said arms and tappets toward each other and for carrying the pressure devices toward the platen, a rock-shaft arranged below the pivots of the arms and extending between the tappets, the shaft portions which engage said tappets being flattened, a crank-arm on the rock-shaft, a link extending upwardly from said crank-arm, and an operating-lever pivoted about a horizontal axis and connected with said link.

2. In a type-writing machine or the like, a platen, a movable pressure device adapted to engage the platen, a rock-sh aft provided with cam portions for moving said pressure device, an operating-lever mounted to turn about an axis parallel to that of the rock-shaft, and a link for operative] y con ncctin g said lever with the rock-shaft.

3. In a type-writing machine or the like, a platen, diverging arms pivoted adjacent to the platen and provided with tappets, pressure devices carried by the said arms and arranged to bear against the platen, a rock-shaft extending between said tappets and in engagement therewith, said shaft having angular portions to govern the position of the tappets and pressure devices, and a lever operatively connected to said rock-shaft.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

JOHN G. MCLAUGIILIN.

Witnesses:

JOHN LOTKA, EUGENE EBLE. 

